Flaky vplayer tests: temporarily disable noblob variant

[rohit-nayak-ps]

Description

The noblob PR #12905 has introduced a race during the unit race test. This is caused by the re-initialization of globalDBQueries, which we do because we run all tests twice: once for the full image and once for noblob. It turns out that the post-copy vcopier task, in TestCancelledDeferSecondaryKeys which runs in a goroutine, gets invoked when we cancel the context before the second set of tests. Since we immediately reinit the query queue, there is a race because the post-copy task is writing to the same query queue.

We will need to do a non-trivial refactor of the test framework before re-enabling the noblob variant. This PR temporarily disables them since the flakiness is blocking other PRs

Related Issue(s)

#13093

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